From LatinMartinus(“of or like Mars" or "little Mars”), Mars, Martis + -inus (diminutive suffix). Furthermore, the name Mars is likely to have been brought into Latin from elsewhere, likely the EtruscanMaris that was their name for the same deity.

Luther was not born in the year 1483, but in 84; and not on the 22nd day of October, but on the 10th of November, the eve of Martinmas day, from whence he had the name of Martin. - - - Now you see, brother Toby, he would say, looking up, "that christian names are not such indifferent things;" - Had Luther here been called by any other name but Martin, he would have been damned to all eternity - Not that I look upon Martin, he would add, as a good name - far from it - 'tis something better than a neutral, and but a little - yet little as it is, you see it was of some service to him.

[1] Danskernes Navne, based on CPR data: 58 178 males with the given name Martin have been registered in Denmark between about 1890 (=the population alive in 1967) and January 2005, with the frequency peak in the 1980s. Accessed on 19 June 2011.

[3] Statistiska centralbyrån and Sture Allén, Staffan Wåhlin, Förnamnsboken, Norstedts 1995, ↑ISBN: 72 420 males with the given name Martin living in Sweden on December 31st, 2010, with the frequency peak in the 1980s. Accessed on 19 June 2011.